Finding the Fourth Proportional to 231,282.38, 347,054.79 and 91,139.42

Step by Step Solution

1. Step 1: Write the proportion equation
   231,282.38 : 347,054.79 = 91,139.42 : x
2. Step 2: Convert to fraction form
   231,282.38/347,054.79 = 91,139.42/x
3. Step 3: Cross multiply
   231,282.38x = 347,054.79 × 91,139.42
4. Step 4: Simplify right side
   231,282.38x = 31,630,373,478.23
5. Step 5: Solve for x
   x = 31,630,373,478.23/231,282.38
6. Step 6: Final answer
   x = 136,760.84